Double core-barrel for core-drills



C. C. HANSEN.

DOUBLE CORE BARREL FOR CORE DRILLS.

APPLICATION FILED AUG.3, 1920.

1383,9390 Patented July 5, 1921..v

INVENTOR a 1 7 $0; ATTORNEY I entree stars rarer ewe CHARLES C. HANSEN, 0F EASTON, PENN SYLVANIA, ASSIG-NOJR. T0 INGERSOLIt-R 'COIMPAINY, OF JERSEY CITY, NEW JERSEY;A CORPORATION,OF JERSEY.

DOUBLE CORE-BAR FOR CORE-DBMS.

. Application filed August 3,

To all whom it wiag concern:

Be it known that 1, CHARLES C. HANSEN,

a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented a certain new and useful Improvement in Double Core-Barrels for Core-Drills, of which the following is a specification.

, This invention relates to core barrels for core drills, but more articularly to a double core barrel for use wlth a shot bit.

The primary object of the invention is to enable the shot and cleaning fluid as .water to be introduced through the usual hollow drill rod and carried downwardly through the space between the outer and inner core barrels to the cutting'edge of the bit, without coming in contact with the core, which is protected by the inner core barrel. Another object of the invention is to provide means for slidably and loosely mounting the inner core barrel on a support within the outer core barrel at its lower end and on a core barrel plug at its upper end and permit the shot and water to pass .through lateral openings in the bitabove the inner core barrel support to the cutting edge so that the shot and water pass around the outside of the bit to the cutting edge.

Another object of the invention is to provide a relief valve which controls communication between the inside of the inner core barrel and the space between the barrels for equalizing the pressure above the core, as the core is gradually extended up into the innercore barrel. Y To all of these ends the invention is shown in one of its preferred forms in the accompanying drawings in which- Figure 1' is a vertical sectional view of tion in the act of cutting the core, with the hollow drill rod omitted for simplicity, Fig. 2 is a detail sectional elevation showini thecore after it has been broken,

ig. 3 is a transverse sectional view on the line 3-3 of Fig. l, and Fig. A is a transverse sectional view on the line 4-4 of Fig. l p Referring to the drawings, A represents the outer core barrel having the shot bit B- -connected thereto at its lower end and provided with a series of lateral openings C for the passage of shot and cleaning fluid as water to the cutting edge of the b1t.

Specification of Letters Patent.

Patented July 5, rear. 1920. serial No. eoinoo.

A core barrel plug D having the bore E in its upper port on is connected to the. upper end of the outer core barrel A and extends within the said barrel. This core barrel plug is adapted to be connected to the usual hollow drill rod (not shown).

A cbrebarrel support F in the forrn'of an annular ring is mounted in the upper pork tion of therbit B substantially below the lateral openings 0. This core barrel support is preferably provided with a beveled upper edge G and a shoulder H, upon. which shoulder the innercore barrel J is loosely mounted or supported. The upper end of the inner core barrel J is slidably supported and guided by the downwardly extending portion K of the plug D.

Radial passages L lead from the bore E of theplug Dto the space 0 between the inner and outer core barrels so that shot and water introduced into the bore F of the plug D are carried outwardly by centrifugal force by the passages L and pass downwardly in the space between the outer and inner barrels to the aperture C and thence pass downwardly through the grooves P in the outside of the bit to the cutting edge. In this way the shot and water do not come in contact with the core Q. A core lifter R of the usual form may be provided in the bit and the core is shown broken and in the actof lifting in Fig. 2.

. A valve chamber S is provided within. the

lower end of thefcor'e barrel plug D and 3 a double core-barrel embodying the inven-othe'inner'core barrel J to the valve chamber 1. A. double core barrel for core drills comprising outer and inner barrels, a bit connected to the lower end of the outer barrel, a plug connected to the upper end of said outer barrel, the said'plug having an,

per portion of the bit, whereby shot and cleaning fluid introduced into the plug are carried by centrifugal action into the space between the barrels, and pass downwardly and out through the said lateral apertures and around the outside of the bit to the cutting edge. I v

2. A double core barrel for core drills comprising outer and inner barrels, a bit connected to the lower end of the outer barrel, a'plug connected to the upper end ofthe outer barrel, the upper portion of said plug having a bore to receive shot and water, a support for the lower end-of the inner barrel also forming a closure for the annular space between the barrels, and arranged below a series of lateral openings in the upper portion of the bit through which shot and cleaning fluid pass around the outside of the "bit to the cutting edge, passages leading from the bore of the plug to the space between the barrels a valve chamber in the lower portion of the plug, and a relief valve in said chamber for controlling communication between the inside of the inner barrel and the space between the barrels.

3; A double core barrel' for core drills comprising an outer barrel, a plug connected-- to said barrel at its upper end and extending within .the barrel, the upper portion of sai plug having a bore adapted to communicate with a hollow drill rod, and a shot bit carried by said barrel at its lower end and provided with lateral openings, a core barrel support within the bit arranged below the said openings, an inner barrel loosely mounted on said support and slidably guided at its upper end by the lower end of the core barrel plug, passages leading from the bore of the plug to the space between the outer and inner core barrels for the introduction of shot and cleaning fluid to the bit, a valve chamber in the lower end of said plug communicating with the. interior of the inner barrel and with the space between the barrels, and a relief valve controlling communication between the interior of the inner barrel and the'said valve chamber.

4. A double core barrel for core drills comprising outer and inner barrels, a bit connected to the lower end of the outer barrel, a plug connected to the upper end of the outer barrel, an annular member in said bit supporting the inner barrel and closing the space between the outer and inner barrels, said bit having a series of exteriorlydirected lateral apertures leading from the space between the barrels above said annular member, the upper portion of said plug having a bore tov receive shot and liquid and passages leading tothe space between the barrels, w ereby shot andliquid introduced into the p ug are carried by centrifugal action into the space between the barrels, downwardly, and through the lateral apertures to the outside of the bit and from thence to the cutting edge.

5. A double core barrel for core drills comprising outer and inner barrels, said inner barrel consisting of an open-ended cylinder, a bit connected to the lower end of the outer barrel, an annular member in said bit supporting the innerbarrel and closing the space between the outer and inner barrels, said bit having a series of exteriorly direct- -ed lateral apertures leading from the space said plug communicating with the interior of theinner barrel and with the space between the barrels and a relief valve controlling communication between the interior of the inner barrel and the said valve chamber, the upper portion of said plug having a bore to receive shot and liquid and passages leading to the space between the barrels,

whereby shot and liquid introduced into the plug are carried by centrifugal action into the space between the barrels; downwardly,

and through the lateral apertures to the out side of the bit and from thence to the cuttinlg edge. v

. n testimony whereof I have signed this specification. v

5 CHARLES C. HANSEN. 

